The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2006
Filed:
Nov. 17, 2004
Masahiro Fukuzumi, Machida, JP;
Yuichi Iriya, Yokohama, JP;
Shinichi Okamoto, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An exhaust gas recirculation system is configured to recirculate a large amount of exhaust gas to an engine intake passage while reducing contamination inside the intake passage caused by the recirculated exhaust gas and prevent damage to the intake passage caused by the heat of the recirculated exhaust gas. A first recirculation path recirculates exhaust gas from an upstream section of the exhaust passage located upstream of a catalytic converter unit. A second recirculation path recirculates exhaust gas from a downstream section of the exhaust passage located downstream of the catalytic converter unit. A control unit is provided that controls the switching of a selector valve between the first and the second recirculation paths based on the temperature of the recirculated exhaust gas.